Although Rasayana are the most complex formulations that are often consumed as medicines, others are simpler combinations of foods and individual herbs are also considered Rasayani. Ashwagandha is also referred to as Indian ginseng for rejuvenation and toning. Numerous studies have documented its anti-stress and adaptogenic properties. In one study, Ashwagandha is known to increase physical endurance, prevent stress-induced reductions in vitamin C and cortisol. In Sanskrit, Ashwagandha means the smell of a horse, which means that a person will gain the same strength and endurance as a horse. Rasayana is an anti-stress herb that promotes energy and endurance. Adaptogenic properties of Ashwagandha Although all parts of Ashwagandha are traditionally used for medicine, the root is the most common. Ashwagandha contains at least twenty-six bioactive alkaloids, steroids, lactones called andolides and sitoindosides. Its complex chemistry, much of which is still unknown, offers a wide range of therapeutic actions: tonic, sedative, nerve repair, adaptogenic, aphrodisiac, anti-inflammatory and respiratory stimulant. Ashwagandha has traditionally been used to treat general weakness such as arthritis, depression, chronic fatigue, insomnia, anxiety, suppressed immunity, sexual weakness, infertility, memory loss, respiratory problems and hormonal imbalances. It is used effectively for insomnia. Instead, it restores and rejuvenates the nervous system by providing energy to the body to sleep. Thus, the adaptogenic properties of Ashwagandha help the body cope with stress-related conditions instead of using sedatives.